Window-sash ventilator



(No Model) y. .so BBR. 0W NTILATOR. No. 542,837. l Patented July 16, 1.895.

. UNrifa STATESy condition.

WILLIAM SICHARNWEBER, or ST. LOUIS, MISSOURI.

Wi N DOW-SASH VENTI LATO R.

SPECIFICATION forming part of Letters Patent No. 542,837, dated July 16, 1895.

Application led March 5, 1895. Serial No. 540,584. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM SCHARNWE- BER, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have .invented a certain new and useful Improvement in Window-Sash Ventilators, of which the following is a full, clear, and exact description, reference being had. to the accompanying drawings, forminga part of this speci- Iication, wherein- Figure l is an inside view. of the lower rail of the sash, illustrating my improved ventilator in position. Fig. 2 is a bottom plan view of t-he sash-rail, showing my ventilator attached thereto. Fig. 3 is an inside View of the lower rail of the sash, showing the construction of the same preparatory to receiving the ventilator. Figli is aback elevational View of my improved ventilator. A Fig. 5 is acrosssectional View through the sash-rail with the ventilator in position.

This invention relates to a new and useful improvement in ventilators of that type which are adapted to be secured directly to the rail of a window-sash, preferably the bottom rail of the lower sash. The air is taken from the exterior from beneath 'the sash, thus leaving the outer face of the rail in its original By so taking the air the space between the'sill and bottom rail is kept clear of moisture, at the same time affording a convenient intake for the air, which offers no projection on the exterior, which wouldprevent the passage of the upper and lower sashes beyond each other, if it should be so desired.

In the drawings, A indicates the bottom rail of a sash, which is mortised from its lower face to form chambers B, which chambers preferably do not extend the full length of the ventilator, but are separated by a wall B', for the purpose of maintaining strength. The inner face of the rail is grooved longitudinally,

'as shown in Fig. 3, to receive the ventilator,

and from the bottom of this groove openings C are formed, which connectthe chambers B with the groove. p

The ventilator proper, or the means for controlling the passage of air from the exterior to the interior, is mounted on a frame or plate B, which is secured in position on the sash-rail in any suitable manner. Projecting from this plate B, and preferably formed integral therewith, are sash-lifts D', whose offices are well understood. An offset E, which is closed at its bottom and open at its top to direct the incoming air upwardly, covers the longitudinal opening F in the plate D, which opening is of less width than the projecting anges on the rear side of the plate, forming langesf, for the purpose of receiving the sliding Ventilator-plate G, mounted behind the plate D. `Plate G is moved or controlled by a suitable handle G', and is formed with openings g, which register with corresponding openings in a back plate or close the openings in the.

back plate, as desired.

H indicates the stationary back plate, which is formed with openings h, which, when the plate D is placed in position, align with the Openings C in the sash-rail; but this is unimportant, as there is an air-space between the back plate and the bottoni of the groove, as shown in Fig. 5.

I indicates a rearwardly-projecting flange in which the plates G and H are seated. To yieldingly hold the back plate in position, so that it will slightly press against the sliding plate to make a tight fit between the contacting faces of the two plates, I form lugs on the inner faces of the flanges I and groove the flanges, as at i, on cach side of these lugs. I then insert-the shank or shanks of spring J, whose free ends bear upon the back plate. Over the shank so seated I place a washer or confining-plate and secure the same to its home by a screw j. The yielding pressure thus secured against the back plate is inexpensive, simple, and easily applied. The tension of the spring J can be regulated to any degree by simply bending the shank.

To avoid the entrance of foreign particles or insects, I secure to the bottom of the rail a wire mesh or some foraminous material K, which covers a concave groove running, preferably, the full length of the lower face. In

IOO

between and the backV plate, except at its ends, where itis secured. In this instance the mesh would be absent from the bottom of the rail.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. The herein described window sash rail for receiving a ventilator, said rail being formed with chambers opening on the under side, a groove on its inner side face, and an opening or openings which connect the groove with the chambers, substantially as described.

2. The herein described sash rail for receiving a ventilator, said sash rail being formed with chambers which open on the under side of the rail, said chambers being separated by a strengthening partition wall, a groove on the inner side face of the rail,and communieating openings between the grooves and chambers, substantially as described.

3. The combination with a window sash rail which is formed with chambers opening on its under side, a groove on its inner face, and communications between the groove and chambers, of a ventilator, comprising a main frame formed with an offset or deflector integral therewith, said offset being open at its top, rearwardly extending flanges from the main frame which are received in the groove ot' the sash rail, a sliding ventilator plate which is provided with openings to control openings eliges? in a stationary back plate, and a back plate; substantially as described.

4. The combination with a main frame, Which is formed with a rearwardly extending ange, of a sliding ventilator plate, a yield ing stationary back plate, and springs for holding said back plate in yielding contact with the sliding ventilator plate, the Shanks of said springs being received in grooves on the rearwardly extending flange, and seen red in position bya conlining plate, substantially as described.

5. The combination with a window sash rail, which is formed With chambers opening on its under side,a groove on its inner face, and communications between the groove and chambers, of a ventilator, comprising a main frame, which is formed with a rearwardly extending tlange which is receivedin the groove in the sash rail, a Sliding Ventilator plate, which is provided with openings to control openings in a stationary back plate, and a yielding back plate, substantially as dcscribed.

In testimony whereof Ihereunto affix my signature, in presence of two witnesses, this 25th day of February, 1895.

WILLIAM SCIIARNWEBER.

XVitnesses:

F. R. CORNWALL, HUGH K. WAGNER. 

